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Realization of vortex spin current by spin injection into superconductors

Research Project

Project/Area Number 26610091
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionTohoku University

Principal Investigator

SHIOMI Yuki  東北大学, 金属材料研究所, 助教 (10633969)

Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords超伝導 / ボルテックス / スピン流 / スピントロニクス / 量子渦 / 超伝導ボルテックス / スピン注入
Outline of Final Research Achievements

In type-II superconductors, superconducting vortices appear by penetration of external magnetic fields in superconductors. In this study, we aim to realize a novel spin current using the flow of superconducing vortices. The samples are bilayers of s-wave superconductor|ferromagnet and d-wave superconductor|ferromagnet. By applying temperature gradient or microwaves to the ferromagnetic layer, spin current was injected from the ferromagnet to the adjacent superconductor. The vortex spin current in superconductors was measured via a spin-to-charge conversion effect in superconductors. As a result, we observed an electric signal in superconducting states, which was never observed in normal states. From additional experiments, we showed that this electric signal observed only in superconducting states is related to dynamics of superconducting vortices. We have discussed microscopic mechanisms of this novel effects.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (8 results)

All 2016 2015 2014

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Acknowledgement Compliant: 7 results,  Open Access: 1 results)

  • [Journal Article] Dispersion-type Hall resistance in InSb vertical bar Pt hybrid systems2016

    • Author(s)
      Y.Shiomi, and E.Saitoh,
    • Journal Title

      Scientific Reports

      Volume: 6 Issue: 1 Pages: 22085-22085

    • DOI

      10.1038/srep22085

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Reducing Galvanomagnetic Effects in Spin Pumping Measurement with Co75Fe25 as a Spin Injector2015

    • Author(s)
      S. M. Haidar, R. Iguchi, A. Yagmur, J. Lustikova, Y. Shiomi, and E. Saitoh
    • Journal Title

      Journal of Applied Physics

      Volume: 117 Issue: 18 Pages: 183906-183906

    • DOI

      10.1063/1.4921359

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Transverse thermoelectric effect in La0.67Sr0.33O3| SrRuO3 superlattices2015

    • Author(s)
      Y. Shiomi, Y. Handa, T. Kikkawa, and E. Saitoh,
    • Journal Title

      Applied Physics Letters

      Volume: 106 Issue: 23 Pages: 232403-232403

    • DOI

      10.1063/1.4922294

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Anomalous Hall effect with giant hysteresis loop in La0.67Sr0.33MnO3|SrRuO3 superlattices2015

    • Author(s)
      Y.Shiomi, Y. Handa, T. Kikkawa, and E. Saitoh,
    • Journal Title

      Physical Review B

      Volume: 92 Issue: 2 Pages: 024418-024418

    • DOI

      10.1103/physrevb.92.024418

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Enhanced inverse spin Hal contribution at high microwave power levels in La0.67Sr0.33MnO3/SrRuO3 epitaxial bilayers2015

    • Author(s)
      S.M.Haidar, Y. Shiomi, J. Lustikova, and E. Saitoh,
    • Journal Title

      Applied Physical Letters

      Volume: 107 Issue: 15 Pages: 152408-152408

    • DOI

      10.1063/1.4933379

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Vector spectroscopy for spin pumping2015

    • Author(s)
      J.Lustikova, Y.Shiomi, and E.Saitoh,
    • Journal Title

      Physical Review B

      Volume: 92 Issue: 22 Pages: 224436-224436

    • DOI

      10.1103/physrevb.92.224436

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Spectral shape deformation in inverse spin Hall voltage in Y3Fe5O12 Pt bilayers at high microwave power levels2015

    • Author(s)
      J. Lustikova, Y. Shiomi, S.M. Haidar, and E. Saitoh
    • Journal Title

      Journal of Applied Physics

      Volume: 117 Issue: 7 Pages: 073901-073901

    • DOI

      10.1063/1.4908211

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Spin current generation from sputtered Y3Fe5O12 films2014

    • Author(s)
      J. Lustikova, Y. Shiomi, Z. Qiu, T. Kikkawa, R. Iguchi, K. Uchida, and E. Saitoh
    • Journal Title

      Journal of Applied Physics

      Volume: 111 Issue: 15 Pages: 153902-153902

    • DOI

      10.1063/1.4898161

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant

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Published: 2014-04-04   Modified: 2020-05-15  

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